Fitbit Charge 4 Fitness and Activity Tracker
- Use built-in GPS to update your pace and distance on screen during outdoor runs, rides, hikes, and more, you can also see a workout intensity map in the app that shows your heart rate changes along your route
- Use daily heart rate to track resting heart rate & better measure calorie burn.
- See your SpO2 nightly average and range on the wrist, and view trends over the past week in the Fitbit app
- Track your skin temperature each night to see how it varies from your personal baseline
- Track workouts in real-time with more than 20 goal-based exercise modes. It is also swim-proof and water-resistant to 50 Meters
- Multi-day battery lasts up to 7 days and up to 5 hours when using built-in GPS
- Track sleep stages and review your in-app Sleep Score for an easy way to see how well you slept
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